DS is actually just turned 13, so he was of age anyway (although I've bought them in the past when he was younger). Went into local supermarket, DS asked if he could bet an xbox card, I said yes. Went to the till, girl on till said to me does he have ID on him. I obviously said excuse me and she said well I can't sell this unless he's 13. I said yes he's 13 and she said but I have to see ID and I obviously go what kind of ID is a 13 year old supposed to be carrying around and she said "I don't know, a passport?" I was horrified, asked to speak to manager who said she has to back up her colleague. AIBU to think this is silly?